Efficient generation of entangled photons via biexciton states

纠缠态光子是光子之间不可分离的一种特殊状态。这些特殊的光子吸引了光学前沿领域的关注，例如量子信息。在半导体中，双激子态可以是纠缠光子的来源。然而，从双激子中有效产生纠缠光子的好方案还没有建立。本文主要研究半导体微腔的结构，并提出了利用半导体微腔产生纠缠光子的新方案。在此基础上，设计了新方案的腔体结构并制作了样品。最后，对样品的光学性质进行了实验研究。

Entangled photons are special state which cannot be separated between each other. These special photons attract attention of the cutting-edge field of optics, e.g. quantum information. In a semiconductor, the biexciton state can be the source of entangled photons. However, the good scheme of effective generation of entangled photons from biexcitons was not established. In this work, I focused on the structures of semiconductor microcavities, and devised new scheme of entangled photon generation from a semiconductor microcavity. Furthermore, I designed the cavity structures for the new scheme and fabricated the samples. Finally, the optical properties of the samples were investigated experimentally.